Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbed38ad473cbb91…

MALICIOUS

PDF

73.9 KB Created: 2021-09-21 06:34:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 17a873090f22992f9f62c3b851467a9d SHA-1: f3769384a5ede54b2b1b824b33e2eb70cdcc00c5 SHA-256: bbed38ad473cbb91810218ae05fe06ae4d03f13dc3d67a339b43e88951eb0109
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The presence of numerous embedded URLs, many pointing to potentially malicious domains, suggests an attempt to redirect the user to a phishing or malware distribution site. The 'SE_URGENCY_LURE' and 'SE_CALLBACK_LURE' heuristics indicate the document likely uses social engineering tactics to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://foxgraphics.paulsfashion.in/files/nazaboxuzibokapizefexiw.pdf In PDF document text
    • http://actlogistic.vn/upload/editor/files/69577784433.pdfIn PDF document text
    • http://hizirferforje.com/admin/fckeditor/editor/images/file/90492739202.pdfIn PDF document text
    • http://personnelstrategies.net/userfiles/file/zumasometafejovowanexopop.pdfIn PDF document text
    • https://oreopay57.com/ckfinder/userfiles/files/44282213013.pdfIn PDF document text
    • http://www.bash.cl/media/file/90339617495.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/58805824824.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/23773383899.pdfIn PDF document text
    • http://natalieshuff.com/uploads/file/manog.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/79158511597.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/4431154b24174e2a9c70676448761b79/kedupatolasodojiloxafo.pdfIn PDF document text
    • http://ks-system.co.uk/ckfinder/userfiles/files/69416474520.pdfIn PDF document text
    • http://kiko168.com/UploadFile/file/20210919202152813.pdfIn PDF document text
    • http://alacarte-husum.de/userfiles/file/45544840798.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/puginabovij.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/beluwajusiguboxokasonow.pdfIn PDF document text
    • https://dawnraytech.985.tw/data/file/userfiles/files/11218562714.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/51344406137.pdfIn PDF document text
    • http://lixupeng.com/uploads/files/44592814221.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/petupuvipudosazebidiguk.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/46910596342.pdfIn PDF document text
    • https://mptradingcompany.com/userfiles/file/bafebojejazobagi.pdfIn PDF document text
    • https://longislandinvestmentadvisors.com/nini/userfiles/file/jevaki.pdfIn PDF document text
    • http://khocabien.com/uploads/files/rotuxubukorukof.pdfIn PDF document text
    • https://inprovitargentina.com/ckfinder/userfiles/files/winapizupijugu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=reveal+no+caller+id+iphonePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD55 17328 bytes
SHA-256: d6306298d8b076905a4b7cead8928756b2306571dfcd891946b9aa189374d37d
font_01_sfnt_off0000eaae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAE 10456 bytes
SHA-256: be6333b2cda0dca3d616a2e74a8893fa26c74512606d54a4872d4a27e31c78c4
font_02_sfnt_off00010247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10247 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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